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LOCATE DEUCE BODY / HOIST / SUBFRAME
Before placing the Deuce body/hoist/subframe on the truck, measure the length of the truck frame behind the
rear axle. The maximum truck frame length that will not affect the operation of the Deuce is 47 1/2 inches,
assuming a cab clearance of 3 inches. The minimum truck frame length for supporting the Deuce subframe
is 40 1/2 inches, assuming a cab clearance of 3 inches. If the truck frame is longer than 47 1/2 inches, mark
the truck frame at the preferred length of 43 inches and cut it off. See Figure 1.
If the frame cannot be shortened to 47 1/2 inches, the cab clearance can be increased by moving the Deuce
body/hoist/subframe back. HOWEVER, this will affect weight distribution.
The Deuce body, hoist and subframe come pre-assembled. Place the body/hoist/subframe on the truck with
a minimum of 3 inches of cab clearance. See Figure 1.
NOTE: If the truck frame has rivets in the top flange, add spacers between the truck frame and subframe,
or counter sink the rivet heads into the subframe by drilling holes in the subframe. Do not remove the rivet
heads!
3" CAB CLEARANCE
MINIMUM FRAME LENGTH
PREFERRED FRAME LENGTH
MAXIMUM FRAME LENGTH
FIG. 1
1644259E (406159)
41"
43"
47 1/2"
6
2020-09-30
LOCATE MOUNTING PLATES
The Deuce subframe must be attached to the truck frame at six locations, four mounting plates, two on each
side, and two welds at the very rear of the truck. The rear mounting plates must be located within 5 inches
of the rear crossmember of the subframe. The front mounting plates must be located behind the front cross-
member of the subframe and within 2 inches of the crossmember. See Figures 2 and 3.
Clamp the mounting plates to the truck frame and to the subrame as shown in Figures 2 and 3. If desired,
locate the plates to use existing holes in the truck frame. Mark the mounting plates for drilling. Repeat this
for the other side. If using existing holes larger than 11/16", use an appropriate sized bolt.
REAR
FIG. 2
WELD
SUBFRAME
MOUNTING PLATE
CROSSMEMBER
NOTE: When the Deuce tips to the side, there are horizontal and vertical forces at the
crossmembers. For this reason, it is important to locate the mounting plates as shown.
CAUTION: BE CAREFUL OF BRAKE LINES, WIRING, ETC. INSIDE THE
TRUCK FRAME WHEN DRILLING THE TRUCK FRAME.
DRILL TRUCK FRAME
Drill 21/32" holes in the mounting plates and the truck frame. Bolt the mounting plates in place using 5/8 x
2 cap screws (grade 8), flat washers and hex lock nuts, tightening to 180-190 lb-ft.
WELD MOUNTING PLATES TO SUBFRAME
Make sure the body/hoist/subframe assembly is correctly located, centered on and square with the truck
frame. Continuously weld the mounting plates to the subframe.
WELD SUBFRAME TO TRUCK FRAME AT REAR
After the mounting plates have been installed, weld the rear crossmember of the subframe directly to the end
of the truck frame. On Ford trucks, please refer to the frame section in Ford's "Qualified Vehicle Modifier
Unique Guidelines and Requirements" document (www.fleet.ford.com/truckbbas/non-html/qpg/2004/f-se-
riesguidelines04.pdf). On GM trucks, please refer to the chassis section in their "Best Practices Manual"
(www.gmupfitter.com/publicat/introduction.pdf). DO NOT weld the subframe to the truck frame in any oth-
er location. ONLY at the rear!
1644259E (406159)
FRONT
WELD
SUBFRAME
CROSSMEMBER
MOUNTING PLATE
7
2020-09-30
FIG. 3
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